Calendar



Sept. 14 1926.

I I P. J. DE JONGH CALENDAR Filed Sept. 6, 1924 2 Sheets-Sheet 2 Fig.6

l n twin; '7 J. 0/: ar? y' i helical 'movement Patented Sept. 14, 1926.

UNITED ST TES PAT PHILIPPE JOSEPH DE JONG-H, OF PARIS, FRANCE. 7

' CALENDAR.

Application filed September 6, 1924, Serial No. 736,369, and in France.Tulyl't, 1924.

The present invention relates to a calendar or date indicator intendedto indicate every day the day of the week and the day of the month, insuch manner that all errors are eliminated, the device always remainingin the proper adjustment which need be effected-only once a month.

The calendar according to the invention comprises, within a suitablecasing or body pierced with apertures, a revoluble cyllnder, upon thelateral surface of which are inscribed thedays of the week, and ahehcally guided cylinder, which the days of the month are lnscribedalong a helix having the same pitch as the two cylinders being connectedtogether in such manner as to rotate by the same angle when the cylinderfor the .days of the week is actuated, and to allow the cylinder for thedays of the month to move axially w1th respect to the cylinder for thedays of the week. The cylinder for the days of the month and thecylinder for the days of the week are 50 connected together that therespective angular positions of the said cylinders can be changed withfacility in order to provide for a monthly adjustment.

Further characteristics of the invention will be set forth in the courseof the followiing description which is given with reference to theappended drawings showing by way of example various embodiments of thesaid invention. In these drawings:

Fig. 1 is an elevational view of a lead penoil which is so arranged asto contain a cal endar according to theinvention, f Fig. 2 1s a partialvertical section of the same. a

Fig. 3 1s a horizontal sectionon the line 3-3 of Fig. 2.

Fig. 4 is an elevational view of a calendar for oifice use according tothe invention, and Fig. 5. is a vertical section of the casing of thesame, showing the elements disposed in the interior. y Fig. -6 showsanother embodiment. Fig. 7 is a modified form of the device controllingthe 'movement of the internal elements. I f Fig. 8 is a sectional view,partially in eleupon the lateral surface of of thelatter cylinder, the

vation of a calendar combined with a leadpencil, accordlng to anotherembodimentof the invention.

Figs. 1 to 3 shows an embodiment of the invention comprising a cylinder1 upon-- which the days of the month are inscribed according to a helix,each: spiral turn containing seven numbers. The elements bear ing thecharacters for the days of the'week consists of a cylinder v 2, thetwo'cylinders .1 and 2being disposed within a. main body or casing 8having'therein the apertures 24 and'5 respectively for the days of themonth and the days of the week. The said casing also forms the main bodyof a lead pencil whereof the axial elongated part 6 is'disposed withinthe'cylinder used for the days of the month which has'for-this purpose atubular form, or insuch manner that there will be'no hindrance to themovement of the latter.

The cylinder is provided at the bottom with 'a washer 7 entering-intocontact with the casing 3 and for the days of the week'2 maintained by.the screw cap 8, this arrange- 1 ment preventing all displacement of thesaid 1 cylinder according to the axis of the cas' ing. At the top of thecylinder is mounted a disc 9 which'is secured to a seven-sided rod 10extending downwardly for the entire height of the cylinder-2 and towhich is secured an outer milled button'll; the rod 10. extends upwardlyand traverses a disc 12 which'is secured to the bottom'of the cylinderused for the days of the month, said disc being pierced with 'aseven-sidedaper tur'e which allows the rod 10 to slide with referencetothe disc 12 but provides for the entraining of the-said disc andhenceof the cylinder 1 in the movement of rotation which-can beimparted'tothe said rod by means of the said milled button 11.;

The sliding movement of the cylinder-'1 I upon the rod 10, i. e.the'helical-motion of said cylinder within the'casing 3 is obtained bymeans of the stud 13 secured to-the lat.-' helical ter; and engaging acorresponding groove 1 1 in the said cylinder.

By turning the button 11 through of a revolution", the indications eachmorning for the day of the week and'gthe day of the month which iscommencing will be brought opposite the corresponding apertures by asingle operation. Suitable holes 15 are provided in the cylinder 1 atthe bottom of the groove 14:, a pin being adapted to be inserted intoany one of the holes, said pin serving to stop the device in position byengaging the stud 13, when a given day of the month chosen in advance(the 28th, 29th, th or 31st according to the month or any other day)appears at the aperture a.

In order to adjust the calendar, the button llis turned backwards so asto lower the cylinder 1 within the casing 8 and thus disengage the stud13 from the groove 14. It is then simply necessary to unscrew the cap 8in order to remove the whole mechanism, separate the two cylinders,andagain place'the cylinder 1 upon the rod 10, disposing the number 1and the corresponding day of the weelrupon the same vertical line, thewhole'being then put again in place Within the said casing. For themonthly adjustment, :one may dispose special characters upon eachcylinder 1 and 2 Which are made to correspond in a suitable mannor; forexample one may inscribe in adv'ance upon the cylinder 1 at 16 thedifferent 'months of the year and upon the cylinder 2 at 17 thedifferent 1925, 1926 and so on.

In the example shown in Figs. 1 to 3 which indicate the combinationof acalendar device according to the invention with a leadpencil, one may,as is represented, constitute the member 10 connecting the cylinders 1and 2, by a hollow rod in such manner as to provide a holder for spareleads, it being closed by the plug 18, the ring 19 serving for instanceto attach the pencil to a chain; an eraser might be also disposed at thebottom of the said plug. Further, it is years for instance 192 i,

' obvious that the said ro d may have any-desired cross section providedit enables the adjustmentof the respectivepositions of the cylindersland 2 by 1/7 of a revolution.

Figs. 4 and 5 represent a calendar in accordance With the inventionwhich is in tended for desk use; it comprises a casing 20 closed by acover 21 which may be'hinged and is pierced with an aperture at thecentre affording passage to the operating button 22 for the cylinderused for the days of the week; said cylinder is provided at the upperpart with a plurality o1 studs 2% bearing upon the shoulder 25 of thecasing and providing for the maintenance of the said cylinder inposition within the casing.

Below the cylinder 23 is mounted a disc 26 having secured thereto therods 27 engaging loosely in suitable holes pierced in the disc 28'whichis secured to the top of the cylinder 29. At the lower part or thelatter cylinder are inscribed the days of the month Which have a helicalarrangement upon the surface in such manner that a single spiral turn ofthe helix will comprise 14 numbers; the upper part of said cylinder hasa uniform and smooth surface, it being made for instance of celluloid,and is adapted to receive daily'noteswrittenby hand.

The cylinder 29, which receives by means of the rods 27 the movement ofrotation imparted to the cylinder 23 by the button 22, is displacedaccording to a helix within the casing 20, under the action. of a stud80 mounted upon the said casing and engaging a helical groove 31 in thecylinder. Suitable holes 32 in the bottom of said groove providefor theinsertion of a pin for stopping the device as already explained withreference to Fig. The notches 86 formed at the sides of the grooves 31co-operate with the stud 30 and provide for the temporary stopping ofthe movable parts in the proper positions. 7 V

The device is adjustedas above set forth with reference to Figs. 1 to 3,the number of rods 27 being equal to the number of days of the month perspiral turn, this being 1%. The openings 33, 34: and serve for theobservation of the day of the week, the day of the month and anynoteswhich have been written in advance upon the suitably preparedsurface of the cylinder 29. A

fourth opening 36 serves for the observa-v tion of one of the twelvemonths which are inscribed upon the auxiliary cylinder 37 whichisuisposed at the bottom of the easing 20 and which maybe turned by meansceive the numbers representing the. days of the month and the other isprovided with a suitable surfacen'ior recording daily notes,

said elements being mounted upon a common polygonal rod 18 which issecured to the element 49 which bears the characters indicating the daysoi the week. The ele- Inient provided with the numbers for the days ofthe month is the cylinder 50 which presents the groove 51 co-operatingwith the stationary stud 51; theelemcnt provided with the preparedsurface for inscribing the notes is the cylinder 52 havin formed thereinthe groove 53 co-operating with the fired stud 54;. With thisarrangement, the helix 53 may have a greater pitch than the helix 51,. alarger surface being thus provided for recording the daily notes thanwith the arrangement illustrated in Fig. 5.

7 shows a modification inthe means ensuir the helical movement of thecylinder for t days of the month 55 in the cusing 56. In the said casingisv formed the helical groove 57 co-operating with a 'stud 58 mounted onthe cylinder 55; the inner end of the said stud is engaged in a straightslot 59'of-a certain length formed along a' generatrix of an innercylinder 60; the latter cylinder'is secured to the lower cylinder forthe days of 'theweek 61 by means of a polgonal rod 62 providing for theadjustment of the relative angular positions of the cylinders 60 and 61.hen the control button 63 of the cylinder 61 is turned, this Will rotatethe cylinder 55 by means of the stud 58 engaging the slot 59; thecylinder 55 will be given a helical movement due to the engagement ofthe stud 58 in the groove 57 of the casing 56, the said stud beingdisplaced along the slot 59.

Fig. 8 shows a modification of Figure 2 in the disposition of the studand the helical groove. According to this embodiment, the stud 89 iscarried by the cylinder 87, while the helical groove 88 is formed in theinner wall of the casing 86. The stud 89 cooperating with the groove 88ensures the axial displacement of the cylinder 87 when the same isrotated by the operator. A pin 90, at the end of a clamp 92, extendsthrough suitable holes 93 provided in the casing 86 and opening into thegroove 88 This pin 90 is adapted to engage the stud 89 and to stop therotation of the cylinder 87 at the end of each month. For this purpose,four holes 93, corresponding respectively to the 28th, 29th, 30th and31st of the months are provided, and the pin 90 is inserted in thesuitable hole according to the number of days of the month.

Obviously, the invention is not limited to the constructionalarrangements hereinbetore described and illustrated, which are givensolely by way of example and which are susceptible of variousmodifications Without departing from the principle of the invention.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A calendar comprising in combination an 'outer casing provided withtwo apertures, two superposed cylinders m'ovably mounted in said casing,the first cylinder bearing characters disposed in a circle andindicating the days of the week and the second cylinder bearing figuresdisposed accoring to a helix and indicating the days of the month, apolygonal member axially arranged with respect to the cylinders, securedto one of these cylinders and adapted to have an axial displacement withrespect to the other cylinder, said member being formed with a number ofedges proportional to the number of figures for the days of the monthper spiral turn of the said second cylinder, means for imparting'to saidmember a rotary movement on the axis of the cylinder, means forpreventing all ing,

mounted in said casing, the first cylinder bearing characters CllSPOSGClm a circle andcasing, distinct from the first one and hear ing figuresdisposed according to a helix and indicating thedays of the month, meansfor connecting said movable cylinders together and cause the same tosimultaneously rotate within the casing and for adjusting the rela-'tive angular position thereofi'means for imparting a rotary movementtothe aggregate of the cylinders and means embodying a helical groove anda stud engaging the lat ter for causing the second cylinder to takean'axial displacement with respect to the outer casing. 3

3. A calendar comprising in combination an outer casing provided withtwo apertures,

a first cylinder movably mounted. in said casing andbearing charactersdisposed in a circle and indicatlng the days or the week, a

second cylinder movablym'ounted in the cas-' ing, distinct from thefirst one and bearing figures disposed according to a helix and indicating the days of the month, means for connecting said movablecylinders together and cause the same to simultaneously rotate withinthe casing and for adjusting the relative angular position thereof,means for imparting a rotary movement to the aggregate of the cylindersand means embodying a helical groove and a stud engaging the lattor forcausing the second cylinder to take an axial displacement with respectto the outer casing, said groove being provided with radial recesses anda removable pin being adapted to be engaged in one of said recessesrorstopping said stud when the second cylinder is rotated.

4. A calendar comprising in combination an outer tubular casing open atboth ends and provided with lateral apertures, a lead pencil mechanismclosing said-casing at one end, and extending axially through saidcastwo superposed cylinders movably indicating the days of the week andthe sec ond cylinder bearing figures disposed according to a helix andindicating the days of the month,means for connectingthe said cylindersand'adjusting' the relative angular position thereof, means forimparting-to the aggregate of these cylinders a rotary move ment ontheir common axis,.means for imparting to the second cylinder astraightmovement along said axis, a hollow poly onal rod axiallyarranged with respect to' the cylinders, secured to one of thesecylinders and adapted to have an axial displacement with respect to theother cylinder, said rod having a number of edges proportional to thenumber of figures for the days of the month per spiral turn of the saidsecond cylinder, a removable plug for closing said hollow rod at itsouter end and a fixed Wall for closing it at its other end, an outeroperatingbutton secured to the rod, 10 and means for preventing allstraight movement of the first cylinder along its aXis.

In testimony whereof I have signedmy name to this specification.

PHILIPPE JOSEPH De JONGH.

